* {
    margin: 0;
    padding: 0;
  }
  .box {
    width: 1226px;
    margin: 0 auto;
  }
  header {
    width: 100%;
    display: flex;
    justify-content: space-around;
    background: #333;
    height: 30px;
    color: #b0b0b0;
    align-items: center;
  }
  ul {
    display: flex;
  }
  ul > li {
    float: left;
    /* overflow: hidden; */
    margin: 0 5px;
    list-style: none;
  }
  .header-nav {
    width: 100%;
    display: flex;
    justify-content: space-around;
    align-items: center;
  }
  .img1 {
    width: 49px;
    height: 49px;
  }
  .i1 {
    right: 51px;
    z-index: 1;
    width: 223px;
    height: 38px;
    padding: 0 10px;
    font-size: 14px;
    line-height: 48px;
  }
  .below {
    width: 100%;
    height: 70px;
    background-color: #fff;
    /* display: flex; */
    /* align-items: center; */
  }
  .u1 {
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
    /* align-items: center; */
    color: gray;
     
  }
  .u1>li{
      border-right: 1px solid grey;
      padding-right: 30px;
  }
  .L1{
      color:#b0b0b0 ;
  }
  .Sub-component-diagram{
      width: 1226px;
  }
  .dv1{
      width: 100%;
      height: 452px;
      background-color: red;
  }
  .img2{
      width: 100%;
      height: 452px;
  }
  .img3{
      
      width: 854px;
      height: 654px;
      margin: 0 auto;
  
  }
  .dv5{
      box-sizing: border-box;
      width: 854px;
      margin: 0 auto;
  }
  